AP EAMCET · PHYSICS · Capacitance
The plates of a parallel plate capacitor are charged upto \(100 \mathrm{~V}\). A \(2 \mathrm{~mm}\) thick insulator sheet is inserted between the plates. Then to maintain the same potential difference, the distance between the plates is increased by \(1.6 \mathrm{~mm}\). The dielectric constant of the insulator is
- A 6
- B 8
- C 5
- D 4
Answer & Solution
Correct Answer
(C) 5
Step-by-step Solution
Detailed explanation
Potential of capacitor before inserting insulator, \[ V=\frac{\sigma d}{\varepsilon_0} \] where, \(\sigma=\) surface charge density, \(d=\) distance between plates and \(\varepsilon_0=\) permittivity of vacuum. Given, \(\frac{\sigma d}{\varepsilon_0}=100\) Now, potential after…
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